VocaForm (App Store link) is a monophonic performance synthesizer instrument for the iPhone / iPod Touch.

Vocaform uses formant synthesis to mimic resonant body sounds such as a voice. The results are similar to vintage 8-Bit console sounds.

The user interface focuses on making live performance simple, intuitive, and fun. The main screen is optimized to allow easy access to the most useful parameters. Detailed sound adjustments can be performed in the editing screens.

Features:

• 2 octave, Moveable-Do keyboard.
• Responsive, touch-based vibrato.
• Adjust each sound by editing 5 formant regions.
• Editable ADSR envelope.
• Accelerometer controlled volume.